diff --git a/Jumpy.Shared/JumpyGame.cs b/Jumpy.Shared/JumpyGame.cs
index 3bc9bf8..80a681d 100644
--- a/Jumpy.Shared/JumpyGame.cs
+++ b/Jumpy.Shared/JumpyGame.cs
@@ -63,12 +63,13 @@ namespace Jumpy {
     protected override void Draw(GameTime gameTime) {
       GraphicsDevice.Clear(Color.CornflowerBlue);
 
+      const int spriteSize = 144;
       int frameNum = gameTime.TotalGameTime.Milliseconds / 250;
       if (frameNum == 3) {
         frameNum = 1;
       }
-      int sourceX = 144 * frameNum + 144 * 6;
-      int sourceY = 144 * 0;
+      int sourceX = spriteTileSize * frameNum + spriteTileSize * 3;
+      int sourceY = spriteTileSize * 0;
       Rectangle source = new Rectangle(sourceX, sourceY, 144, 144);
       // Vector2 position = new Vector2(0, 0);
       Vector2 position = new Vector2(100, 100);